Forum Discussion

Anonymous's avatar
Anonymous
Not applicable
6 years ago

SSAS DNS name not working from Report Server:

Hi,   I am able to connect to my SSAS Instance with DNS/Alias name from SSMS and Power BI desktop. But once report is published to report server, it fails to render data. And when i modify the con...
Need Help
d_gosbell's avatar
d_gosbell
Super User
6 years ago

Are your Power BI Report Server and SSAS instances on separate machines? If so you probably have a Kerberos configuration issue.

 

SSMS and Power BI Desktop can fall back to using NTLM authentication as they only do a single "hop" connection

 

Client --> SSAS Server

 

But if Power BI Report Server is running on it's own server (which is a best practice) then you have the following:

 

Client --> Report Server --> SSAS Server

 

Where each of the arrows (-->) is a network hop and NTLM can only do single hop scenarios, for more than one network "hop" you need to have Kerberos configured and the SPNs and constrained delegation settings need to be setup with the correct name. It sounds like you might have these configured using the server name, not the DNS name.

Anonymous's avatar
Anonymous
Not applicable
6 years ago

Hi d_gosbell 

 

Thanks for your response. 

 

SSAS instance and PBIRS are on same server box.

I will check if Keberos delegation is setup for this use case. If now will follow documentation and set it up.

 

Thanks

Manoj

  • d_gosbell's avatar
    d_gosbell
    Super User
    6 years ago

    No, if the two services are running on the one server Kerberos is not your issue.

     

    What error do you get when using the DNS name?

     

    If you log on to the server can you ping the DNS name and does it resolve correctly? 

    • Anonymous's avatar
      Anonymous
      Not applicable
      6 years ago

      Hi d_gosbell 

       

      • Once connection string is modified to have DNS name and click on test connection, i get below error message:

      The report server couldn't connect to the data source using the information you entered. Make sure you've entered the connection string and any credentials correctly.

      Hide error details 

      The connection either timed out or was lost.

       

      • If i just save the connection string with out testing the connection. I get below message while report is rendering/loading the data

       We couldn't connect to the Analysis Services server. Make sure you've entered the connection string correctly.

       

      Thanks

      Manoj

      • d_gosbell's avatar
        d_gosbell
        Super User
        6 years ago

        So you or an admin needs to remote desktop onto the server and see if you can ping the DNS name. If this fails (which I'm thinking it might) then you'll need to work with your IT people to figure out why.